code: def test_builder_eval_scalar(self):
      res = mb.select(cond=True, a=np.float32(1), b=np.float32(2))
      assert isinstance(res.val, np.float32)
      np.testing.assert_allclose(np.float32(1), res.val)
  
imports: import itertools
  import numpy
  import pytest
  from coremltools.converters.mil.mil import Builder
  from coremltools.converters.mil.mil import get_new_symbol, types
  from coremltools.converters.mil.mil.ops.tests.iOS14 import backends
  from coremltools.converters.mil.mil.ops.tests.testing_utils import UNK_SYM, construct_inputs_from_placeholders, run_compare_builder
  from coremltools.converters.mil.testing_reqs import compute_units
  from coremltools.converters.mil.testing_utils import random_gen, ssa_fn
label_desc: Use image node_id 7 for calling the TestSelect obj's underlying member method code with example usage: obj.test_builder_eval_scalar() without return types